Sf6 Circuit Breaker Operating Mechanism Non-full-phase Operation (gl314 Three-phase Split Type)

In power grids of 220kV and above, sf6 circuit breaker operating mechanism with split-phase operation is generally used. During system operation, due to problems such as equipment quality and circuit, one or two phases of sf6 circuit breaker spring mechanism may be disconnected, resulting in non-full-phase operation. In order to ensure the stability of power supply of the power grid, a non-full-phase relay is often set in the three-phase split switch, that is, when a single-phase fault occurs, a short-term non-full-phase operation is allowed. If the reclosing fails and the phase loss situation still exists, the non-full-phase relay is triggered when the set time is reached, and the three-phase circuit is disconnected to disconnect the primary circuit.